The invention discloses a method for determining heavy metal content of sugarcane with electric heating board digestion/ICP-MS (inductively coupled plasma mass spectrometry) methods. The method comprises following steps: 1), sample pretreatment is performed: a sugarcane sample is selected and subjected to digestion and heating digestion, after digestion is finished, residues in a glass beaker are dissolved and washed with 2mL of a salpeter solution (prepared from nitric acid and water through isovolumetric mixing) in a 50-mL volumetric flask, a product is subjected to repeated washing with ultrapure water and constant volume processing until the product reaches the volumetric flask scale and is shaken uniformly to serve as a sample solution for online determination; 2), multiple blank solutions are prepared according to the step 1 except that the sugarcane sample is not added; 3), a standard solution is prepared from a mixed standard storage solution containing multiple elements including Cu, Zn, Pb, Cd, As and Ni, and a working curve of the standard solution is determined; 4), ICP-MS determination is performed. With the adoption of the method, the heavy metal content of the sugarcane can be detected simply, rapidly, efficiently and accurately.