For the issue that children are left in cars and die in summer,experiments are designed by control variable method.The influence of parking places on inside temperature of white car is observed.The front and back seat area temperature are measured and compared.The influence of gaps in the car windows on the inside temperature of the car is observed.Experimental results show that,the inside temperature of white car under the sunlight would sharply increase to over 40℃within 10 minutes when the environment temperature is over 35℃.Parking the car under shadow can control the rise of inside temperature of the car.The inside temperature of the car is uneven and the front seat area temperature is higher than the back seat area temperature.Opening window with a little gap could not prevent the rise of inside temperature of the car.