The invention discloses a multifunctional practical children toy car. The multifunctional practical children toy car comprises a body and chassis. The chassis is installed at the lower end of the device body, the chassis is fixedly connected to the device body through a bolt, a hinge is installed on the left side of the device body, a back box cover is installed on the top surface of the left sideof the device body, the device body is movably connected to the back box cover, a clamping fastener is installed in the middle of the back box cover, the clamping fastener is embedded in the back boxcover, a signal processing device is installed on the internal right side of device body, and the signal processing device is fixedly connected in the device body. An antenna is installed on the topof the device body, the antenna can conduct mobile phone end positioning service on the device matched with the signal processing device, in this way, children can be prevented from loss in accident and failing to find toys due to throwing randomly, and defects of low rate of finding back after loss due the fact that the existing design has no finding back function.