Fore-and-after seat go-cart for double child

The invention discloses a twin children trammer with fore-and-aft seat, which comprises the following parts: trammer frame, front wheel component, back wheel component and seat component, wherein the trammer frame contains two side racks on two sides, which are connected by several connecting rods; the side rack contains front wheel support bar, back wheel support bar, front arm bar and back arm bar; the front wheel support bar connects the front wheel shaft and the back wheel support arm connects the back wheel shaft; the rear part of front wheel support bar hinges the front part of back wheel support bar, which forms a hog back with opening upwards; the front part of front arm bar hinges the middle part of front wheel support bar; the rear part of front arm bar hinges the front part of back arm bar, which forms a hog back with opening downwards; the middle part back wheel support bar hinges the middle part of back arm bar; the hinged fore-and-after wheel support bars and arm bars make side rack form the structure of four connecting rods; the support bar is set between two back wheel support bars of side rack, which contains a button device.