The utility model relates to a baby cart equipped with crawler wheels, which comprises left and right front legs, left and right back legs, wheels, a pushing rod, rails between the left and the right legs, crawler wheels and telescopic supporting bars. Said crawler wheel is composed of 3-5 groups of toothed wheels, a wheel carrier for fixing the wheel shaft and a pedrail provided with grooves; the space between the wheel teeth is the same with the space between the grooves on the pedrail and the tooth matches the groove. The connecting rod and the rails on the wheel carrier are connected with each other through the telescopic supporting bars; the crawler wheels are fixed at the bottom of the cart as spare parts. Extend the telescopic supporting bars to make the crawler wheels contact the ground and support the cart for operation. For stair climbing up or down, extend the telescopic supporting bars at the front or the back end of the crawler wheels so as to sustain the horizontal situation of the cart on the inclined stairs.