Objective To observe the effect and mechanism of Pingwei Xiaodao Capsule （Capsule for functional dyspepsia） on the gastric motility of functional dyspepsia （FD） model rats.Methods Totally 60 wistar rats were randomized into a blank control group （normal group）

model group

domperidone group

Pingwei Xiaodao Capsule large

medium

and small dosage groups.Except for the normal group

the rats of all other groups were irritated by clamping tails for making FD models.Then

the treatment was given for 7 days.The comparative observation was carried out on the gastric interdigestive myoelectric complex （IMC）

slow wave frequency variation coefficient

abnormal rhythm index

and gastric emptying rate of all groups.Results Compared with the model group

the IMC period of domperidone group and all Pingwei Xiaodao Capsule groups was shortened

phase Ⅲ prolonged

incidence of phase Ⅲ increased（P<0.05 or P<0.01）

slow wave frequency variation coefficient and abnormal rhythm index significantly improved （P<0.05 or P<0.01）

and gastric emptying rate increased （P<0.05 or P<0.01）.On increase of the phase Ⅲ incidence

the effect of Pingwei Xiaodao Capsule large dosage group was better than that of the domperidone group and the Pingwei Xiaodao Capsule small dosage group （P<0.05）.On improvement of slow wave frequency variation coefficient and increase of gastric emptying rate

the effect of Pingwei Xiaodao Capsule large dosage group was better than that of the small dosage group （P<0.05）.Conclusion Pingwei Xiaodao Capsule can strengthen the gastric myoelectric activities

promote the gastric emptying and improve the abnormal gastric electric rhythm.The better effect was found in the large dosage group.