Objective To find out risk factors of childhood leukaemia and to providea theoretical basis for the prevention of childhood leukaemia. Methods A case-control study was done in Guangzhou in 2012-2013,with face-toface or telephone questionnaive survey. Epi Data 3. 1 was used to establish database and SPSS 19. 0 was use to do the statistics. Results Univariate analysis showed that drinking milk and mother's education were significant protective factors of childhood leukaemia,with the odds ratio [OR]and 95% con...