The present invention discloses a PTC heater for a novel electric car, and an integrated control system. The PTC heater comprises a heater body and a radiator. The heater body is disposed inside a shell of the heater. The shell of the heater is provided with at least one a temperature sensor and a ground line, wherein N is a natural number greater than 2. According to the radiator, the heater body is provided with a fluid vessel, wherein the fluid vessel is provided with a fluid inlet and a fluid outlet; or the radiator is array heat sinks disposed on the heater body. The control system comprises a controller, a temperature collection module, an insulation detection module, a switch drive module, a voltage collection module, a current collection module, and a control and power supply wiring terminal. The controller is connected with the temperature collection module. The temperature collection module is connected with a temperature detection wiring terminal. The switch drive module is connected with a switch device. The switch device is connected with the heater body. The PTC heater has the advantages of providing a hot air source, sharing a piece or a device with a battery heat dissipation system, being efficient and saving energy. The whole system is stable, is highly integrated, is convenient to use, and is easy to maintain.