Abstract: Objective　To explore the clinical features, treatment, and outcomes of tachycardia induced cardiomyopathy (TIC) in children. Methods　The clinical data of 20 children with TIC hospitalized from January 2007 to October 2014 were retrospectively analyzed. Results　In 20 patients with TIC, there were 11 infants, one toddler, 5 pre-school age children, and 3 adolescent patients were as follows: 15 cases of atrial tachycardia (distributed in each age group), 3 cases of paroxysmal supraventricular tachycardia (2 in infancy and one in adolescence), and 2 cases of ventricular tachycardia (2 in infancy). After the treatment of anti-arrhythmic drugs, sinus rhythm was restored in 11 patients and ventricular rate was controlled in 5 patients while poor effect of drug was found in one patient who received radiofrequency ablation eventually and got cured. Three patients received radiofrequency ablation after admission immediately. Compared with those before treatment, left ventricular ejection fraction (LVEF) and left ventricular diastolic diameter (LVDD) measured by cardiac ultrasonography were significantly improved after treatment (P<0.01). Conclusions　TIC is common in infancy. Atrial tachycardia is the main type of arrhythmia. Generally drug therapy is the first choice in the treatment of TIC but in older children and those refractory to drug therapy the radiofrequency ablation is chosen.